D. A warm up
If you don't warm up, you end up putting your self at risk, by stressing a muscle to far or something along those lines.
Hope this helps!
Answer:
C
Explanation:
It's an exersize done without oxygen :)
Answer:
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.
